Near the soon to be opened and fantastic Park at the Yards, there’s a lot of new low-impact development infrastructure. These bioretention areas should be a great example of the new kind of both urban and environmentally sustainable infrastructure can be.

These are not ordinary tree boxes. Instead of draining into a standard storm

Last week, Jarrett Walker had a great post illuminating the basic reasons for ‘frequency mapping,’ where a transit agency maps out transit routes that meet some threshold for frequent service (such as buses every 10 minutes, or 15 minutes, etc).

There are many degrees of frequency and span, but in general, most transit agencies’ service